after playing the tutorial using the Steam Linux Version, i'm not able to play any further because of an graphical issue (?). Instead of the map just an arrow is displayed and i'm not able to click anything, even the menu. The only thing i can do is to close the window. Appreciating any help!

I've had similar problems, however when the game crashes (after I've played for less than 5 minutes usually, whether or not I'm using Steam) my computer crashes with it, and I have to restart my entire computer. I still haven't gotten past the tutorial because of this problem. Oh, and when I say crashes, I mean that I can move my mouse, but can't click anything: nothing will respond, and the game freezes, essentially. I can't even close the game.